Are abusive partners generally cowards full of excuses?

For instance a girlfriend that finds herself yelling at her boyfriend, claiming to saying mean things she doesn't mean and is sorry afterwards... wouldn't dare get to her workplace and give her boss attitude. Suddenly she needs the money or isn't going to risk getting fired.

Similarly the guy that hits his girlfriend or wife because she just wouldn't stop talking or some other BS excuse, doesn't try that on a tougher male friend or with the police. He sure doesn't want to get either beaten or tased.

So it seems convenient that ''suddenly they couldn't control themselves'' with their partner that clearly is powerless but with a person of higher authority or as stronger as them, they are all relaxed now.

Are abusive partners generally cowards full of excuses?
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